Failed to open map file. V4.7.4

Development Getting Started & Setup
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1

Hi,

I am using the 4.7.4’s UE version, on the Epic games laucher.
And I have versions issues.
After few houres working on a project, I save it and quit.
Then, I can’t anymore open the project and the following message pops up : ‘Failed to open map file. This is most likely because the map was saved with a newer version of the engine.’
Is there a newer version than 4.7.4 ? …
I’ve located my ‘autosave’ files but I don’t know how to use them.

Thanks for helping.

2

Hey Conflit412,

Try going into the Launcher and using the ‘Verify’ option under the current engine version.

Verify Engine Version

37797-verifyengineversion.png

If this option does not work, what you can do is start the editor using the ‘Launch’ option through the Epic Games Launcher. Then create a new blank blueprint project and open one of your auto-saved projects through the File menu.

Let me know if either of these suggestions worked for you, or if you need further assistance.

Thank you,

3

Hi,

thanks for the fast treatment of my issue,

however none of these sugestions did work. I tried to use autosaves but with no result.

I’ve seen today an update on the launcher for UE 4.7.4, that I’m currently downloading. I will start again my project on the latest version, hoping that probleme won’t come again :frowning:

4

Hey Conflit412,

Ok. Let me know if you need assistance or if you managed to get this issue to happen again, provide me with some repro steps?

Cheers,